STRONGYLIUM. 36] 
One example. This species is distinguished by its uniform dull black colour and 
depressed form. JS. atrwm cannot be compared with any other species noticed here; it 
bears a certain superficial resemblance to some members of other groups, ¢@. g. to 
Lhinandrus obsoletus, &c. 
Elytra finely punctate-striate; eyes quite small; upper surface greenish-eneous, 
the elytra dull red; size rather large. 
34. Strongylium opacipenne. (Tab. XV. fig. 15, 3.) 
Moderately elongate, rather broad, somewhat depressed, greenish-zneous with a slight golden tint, not very 
shining. Head closely and rather coarsely punctured, more sparingly so on the vertex, shallowly longi- 
tudinally impressed between the eyes; eyes small, very widely separated ; antennse moderately long, 
rather rapidly widening outwardly, joints 3 and 4 long, subequal, 5-8 more or less subtriangular, 9 and 10 
about as long as broad in the female, slightly longer in the male; prothorax strongly transverse, broad, 
a little broader behind in the female, feebly convex, the sides immarginate (rarely with traces of a fine 
obsolete margin), straight, narrowing from the base, rather more rapidly so in the female, the apex nearly 
straight, the base slightly sinuate, the hind angles subacute, the anterior angles obtuse, the basal fovese 
deep, the disc with a shallow indistinct impression on each side about the middle, and a more distinct one 
in the centre at the base, evidently canaliculate towards the base, indistinctly so in front, the surface 
rather sparingly and coarsely punctured, moderately shining; scutellum broad, subtriangular, slightly 
punctured, greenish-zneous, shining; elytra moderately long, somewhat depressed, rather broad, still 
broader in the female, subparallel in their basal half, with rows of fine closely placed punctures placed 
upon fine shallow strixe, the punctures coarser at the extreme base and a little more scattered at the apex, 
the interstices nearly flat towards the base, slightly convex behind, and closely and very distinctly punc- 
tured, the surface rather dull, red, sometimes very slightly suffused with greenish; beneath more shining, 
greenish-zneous with cyaneous tints, finely and sparingly punctured, the flanks of the prothorax coarsely 
so, the metasternum pubescent in both sexes; legs moderately long, greenish-sneous, rather closely punc- 
tured, the first joint of the posterior tarsi rather shorter than the apical one ; the anterior and intermediate 
tibie a little curved in both sexes, scarcely more strongly so in the male; fifth ventral segment in the 
male unimpressed, and like that of the female. 
Length 123-17 millim.; breadth 43-7 millim. (3 9.) 
Hab. Mexico, Cerro de Plumas (//ége). 
Many specimens. This species is distinguished by its rather dull surface and 
greenish-eneous colour; the elytra red, with rows of fine punctures placed upon 
very shallow strie, and the interstices a little convex and closely and very distinctly 
punctured. 
From 8S. héfpneri and its varieties it is at once separated by its more elongate and 
less convex shape, dull elytral surface, different sculpture, &c. 
Elytra finely punctate-striate, the interstices conver; eyes quite small; upper surface 
dull bluish-green, the suture, base, and lateral margins of the elytra broadly red. 
35. Strongylium bivittatum. (Tab. XV. fig. 16, 3.) 
Moderately elongate, rather broad, convex, dull bluish-green. Head broad behind, rather narrowed in front, 
very closely, coarsely, subrugulosely punctured, indistinctly impressed between the eyes; eyes small, very 
widely separated; antenne (3) rather short, moderately stout, widening outwardly, joints 3 and 4 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 1, January 1888. SAA 
